Initial commit

.gitignore

@@ -0,0 +1,23 @@
+# Binaries for programs and plugins.
+*.exe
+*.dll
+*.so
+*.dylib
+
+# Test binary, build with `go test -c`.
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE.
+*.out
+
+# Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736.
+.glide/
+
+# Binary.
+bin/
+
+# Vendor.
+vendor/
+
+# Test coverage.
+.test_coverage.txt

.gitlab-ci.yml

@@ -0,0 +1,40 @@
+stages:
+  - check
+  - release
+
+check:
+  image: golangci/golangci-lint:v1.53.3-alpine
+  script:
+    - golangci-lint run --timeout 3m
+  stage: check
+
+release-image:
+  stage: build
+  image: docker:latest
+  services:
+    - docker:dind
+  variables:
+    DOCKER_HOST: tcp://docker:2376
+    DOCKER_TLS_CERTDIR: "/certs"
+    DOCKER_TLS_VERIFY: 1
+    DOCKER_CERT_PATH: "$DOCKER_TLS_CERTDIR/client"
+  before_script:
+    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
+    - docker info
+  script:
+    - export TAGS=""
+    - export VERSION="dev"
+    - |
+      if [[ -n "$CI_APPLICATION_TAG" ]]; then
+        export TAGS="$TAGS -t $CI_REGISTRY_IMAGE:$CI_APPLICATION_TAG"
+        export VERSION="$CI_APPLICATION_TAG"
+      elif [[ -z "$CI_COMMIT_TAG" ]]; then
+        export TAGS="$TAGS -t $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA"
+        export TAGS="$TAGS -t $CI_REGISTRY_IMAGE:dev"
+      else
+        export TAGS="$TAGS -t $CI_REGISTRY_IMAGE:latest"
+        export TAGS="$TAGS -t $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG"
+        export VERSION="$CI_COMMIT_TAG"
+      fi
+    - docker build . -f Dockerfile --build-arg VERSION=${VERSION}  $TAGS
+    - docker push -a $CI_REGISTRY_IMAGE

.golangci.yml

@@ -0,0 +1,17 @@
+---
+
+run:
+  skip-dirs:
+    - test/integration/crd
+
+  build-tags:
+    - integration
+
+linters:
+  enable:
+    - misspell
+    - goimports
+    - revive
+    - gofmt
+    - depguard
+    - godot

Dockerfile

@@ -0,0 +1,21 @@
+FROM golang:1.20-alpine as build-stage
+
+RUN apk --no-cache add \
+    g++ \
+    git \
+    make \
+    bash
+
+ARG VERSION
+ENV VERSION=${VERSION}
+
+WORKDIR /src
+COPY . .
+RUN CGO_ENABLED=0 go build -o /hook --ldflags "-w -extldflags '-static' -X cmd.Version=${VERSION:-dev}" .
+
+# Final image.
+FROM alpine:latest
+RUN apk --no-cache add \
+    ca-certificates
+COPY --from=build-stage /hook /usr/local/bin/hook
+ENTRYPOINT ["/usr/local/bin/hook"]

LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+    whether in tort (including negligence), contract, or otherwise,
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+    negligent acts) or agreed to in writing, shall any Contributor be
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+    on Your own behalf and on Your sole responsibility, not on behalf
+    of any other Contributor, and only if You agree to indemnify,
+    defend, and hold each Contributor harmless for any liability
+    incurred by, or claims asserted against, such Contributor by reason
+    of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
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+Copyright 2021 Xabier Larrakoetxea
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

Makefile

@@ -0,0 +1,42 @@
+
+SHELL := $(shell which bash)
+OSTYPE := $(shell uname)
+DOCKER := $(shell command -v docker)
+GID := $(shell id -g)
+UID := $(shell id -u)
+VERSION ?= $(shell git describe --tags --always)
+
+UNIT_TEST_CMD := ./scripts/check/unit-test.sh
+INTEGRATION_TEST_CMD := ./scripts/check/integration-test.sh
+CHECK_CMD := ./scripts/check/check.sh
+DEP_CMD := ./scripts/deps.sh
+GEN_CERTS_CMD := ./scripts/gen-certs.sh
+
+
+help: ## Show this help
+	@echo "Help"
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "    \033[36m%-20s\033[93m %s\n", $$1, $$2}'
+	@echo -e "\033[0m"
+
+.PHONY: default
+default: help
+
+.PHONY: deps
+deps:  ## Fixes the dependencies
+	./scripts/deps.sh
+
+.PHONY: unit-test
+unit-test:  ## Runs unit test in CI environment (without docker).
+	@$(UNIT_TEST_CMD)
+
+.PHONY: check
+check:  ## Runs checks in CI environment (without docker).
+	@$(CHECK_CMD)
+
+.PHONY: integration-test
+integration-test: ## Runs integraton test in CI environment (without docker).
+	@$(INTEGRATION_TEST_CMD)
+
+.PHONY: gen-deploy-certs
+gen-deploy-certs: ## Generate deploy files webhook certificates.
+	@$(GEN_CERTS_CMD)

README.md

@@ -0,0 +1,88 @@
+# k8s-webhook-example
+
+A production ready [Kubernetes admission webhook][k8s-admission-webhooks] example using [Kubewebhook].
+
+The example tries showing these:
+
+- How to set up a production ready Kubernetes admission webhook.
+  - Clean and decouple structure.
+  - Metrics.
+  - Gracefull shutdown.
+  - Testing webhooks.
+- Serve multiple webhooks on the same application.
+- Mutating and validating webhooks with different use cases (check Webhooks section).
+
+## Structure
+
+The application is mainly structured in 3 parts:
+
+- `main`: This is where everything is created, wired, configured and set up, [cmd/k8s-webhook-example](cmd/k8s-webhook-example/main.go).
+- `http`: This is the package that configures the HTTP server, wires the routes and the webhook handlers. [internal/http/webhook](internal/http/webhook).
+- Application services: These services have the domain logic of the validators and mutators:
+  - [`mutation/mark`](internal/mutation/mark): Logic for `all-mark-webhook.slok.dev` webhook.
+  - [`validation/ingress`](internal/validation/ingress): Logic for `ingress-validation-webhook.slok.dev` webhook.
+  - [`mutation/prometheus`](internal/mutation/prometheus): Logic for `service-monitor-safer.slok.dev` webhook.
+
+Apart from the webhook refering stuff we have other parts like:
+
+- [Decoupled metrics](internal/metrics)
+- [Decoupled logger](internal/log)
+- [Application command line flags](cmd/k8s-webhook-example/config.go)
+
+And finally there is an example of how we could deploy our webhooks on a production server:
+
+- [Deploy](deploy)
+
+## Webhooks
+
+### `all-mark-webhook.slok.dev`
+
+- Webhook type: Mutating.
+- Resources affected: `deployments`, `daemonsets`, `cronjobs`, `jobs`, `statefulsets`, `pods`
+
+This webhooks shows how to add a label to all the specified types in a generic way.
+
+We use dynamic webhooks without the requirement to know what type of objects we are dealing with. This is becase all the types implement `metav1.Object` interface that accesses to the metadata of the object. In this case our domain logic doesn't need to know what type is.
+
+### `ingress-validation-webhook.slok.dev`
+
+- Webhook type: Validating.
+- Resources affected: Ingresses.
+
+This webhook has a chain of validation on ingress objects, it is composed of 2 validations:
+
+- Check an ingress has a single host/rule.
+- Check an ingress host matches specific regexes.
+
+This webhook shows two things:
+
+First, shows how to create a chain of validations for a single webhook handler.
+
+Second, it shows how to deal with specific types of resources in different group/versions, for this it uses a dynamic webhook (like `all-mark-webhook.slok.dev`) but this instead, typecasts to the specific types, in this case, the webhook validates all available ingresses, specifically `extensions/v1beta1` and `networking.k8s.io/v1beta1`.
+
+### `service-monitor-safer.slok.dev`
+
+- Webhook type: Mutating.
+- Resources affected: [ServiceMonitors] (`monitoring.coreos.com/v1`) CRD.
+
+This webhook show two things.
+
+- Working with CRDs, in this case mutating them.
+- Working with Static webhooks (specific type).
+
+This webhook takes Prometheus `monitoring.coreos.com/v1/servicemonitors` CRs and sets safe scraping intervals, it checks the interval and in case is missing or is less that the minimum configured it will mutate the CR to set the minimum scrape interval.
+
+This will show us how to deal with CRDs in webhooks, and also how we can make static webhooks to only work safely in a specific resource type.
+
+The static webhooks are specially important on resources that are not known, these are:
+
+- CRDs.
+- Core resources that are on the cluster but not on the webhook libraries, because of Kubernetes different versions (new types and deprecations from version to version).
+
+If we use dynamic webhook on unknown types by our webhook app, we will deal with `runtime.Unstructured`, this is not bad and is safe, it would add complexity to mutate/validate these objects, although for mutating/validating metadata fields (e.g `labels`), is easy and simple.
+
+That said, most webhooks can/should use dynamic type webhooks because are common resources, like `ingress-validation-webhook.slok.dev`, `all-mark-webhook.slok.dev`, that use dynamic webhooks correctly.
+
+[k8s-admission-webhooks]: https://kubernetes.io/docs/reference/access-authn-authz/extensible-admission-controllers/
+[kubewebhook]: https://github.com/slok/kubewebhook
+[servicemonitors]: https://github.com/coreos/prometheus-operator/blob/master/Documentation/api.md#servicemonitor

cmd/deploy.go

@@ -0,0 +1,75 @@
+package cmd
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	_ "embed"
+	"encoding/base64"
+	"encoding/pem"
+	"fmt"
+	"math/big"
+	"strings"
+	"time"
+
+	"github.com/spf13/cobra"
+	"go.uber.org/zap"
+)
+
+func init() {
+	rootCmd.AddCommand(deoplyCmd)
+}
+
+//go:embed deploy.yaml
+var template string
+
+var deoplyCmd = &cobra.Command{
+	Use: "deploy",
+	Run: func(cmd *cobra.Command, args []string) {
+		// 1. create ca and key for webhook
+		key, err := rsa.GenerateKey(rand.Reader, 2048)
+		if err != nil {
+			zap.L().Fatal("failed to generate key", zap.Error(err))
+		}
+		cfg := &x509.Certificate{
+			SerialNumber:          big.NewInt(1),
+			Subject:               pkix.Name{CommonName: fmt.Sprintf("%s.%s.svc", app, namespace)},
+			NotBefore:             time.Now(),
+			NotAfter:              time.Now().Add(365 * 24 * time.Hour),
+			BasicConstraintsValid: true,
+			IsCA:                  true,
+			KeyUsage:              x509.KeyUsageCertSign | x509.KeyUsageDigitalSignature,
+			ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+			DNSNames:              []string{fmt.Sprintf("%s.%s.svc", app, namespace)},
+		}
+		cert, err := x509.CreateCertificate(rand.Reader, cfg, cfg, &key.PublicKey, key)
+		if err != nil {
+			zap.L().Fatal("failed to create cert", zap.Error(err))
+		}
+
+		template = strings.ReplaceAll(template, "NAMESPACE", namespace)
+		template = strings.ReplaceAll(template, "APP", app)
+		template = strings.ReplaceAll(template, "CA_BUNDLE", base64.StdEncoding.EncodeToString(pem.EncodeToMemory(&pem.Block{
+			Type:  "CERTIFICATE",
+			Bytes: cert,
+		})))
+		template = strings.ReplaceAll(template, "KEY", base64.StdEncoding.EncodeToString(pem.EncodeToMemory(&pem.Block{
+			Type:  "RSA PRIVATE KEY",
+			Bytes: x509.MarshalPKCS1PrivateKey(key),
+		})))
+		fmt.Println(template)
+	},
+}
+
+var (
+	namespace string
+	app       string
+)
+
+func init() {
+	rootCmd.AddCommand(deoplyCmd)
+
+	deoplyCmd.PersistentFlags().StringVar(&namespace, "namespace", "default", "namespace")
+	deoplyCmd.PersistentFlags().StringVar(&app, "app", "default", "app")
+}

cmd/deploy.yaml

@@ -0,0 +1,88 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: APP
+  namespace: NAMESPACE
+  labels:
+    app: APP
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: APP
+  template:
+    metadata:
+      labels:
+        app: APP
+    spec:
+      containers:
+        - name: APP
+          image: gitlab.yoshino-s.xyz/yoshino-s/cilium-envoy-hook:latest
+          imagePullPolicy: Always
+          args:
+            - --tls-cert-file-path=/etc/webhook/certs/cert.pem
+            - --tls-key-file-path=/etc/webhook/certs/key.pem
+          ports:
+            - name: http
+              containerPort: 8080
+              protocol: TCP
+          volumeMounts:
+            - name: webhook-certs
+              mountPath: /etc/webhook/certs
+              readOnly: true
+      volumes:
+        - name: webhook-certs
+          secret:
+            secretName: APP-certs
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: APP
+  namespace: NAMESPACE
+  labels:
+    app: APP
+spec:
+  ports:
+  - name: http
+    port: 443
+    targetPort: 8080
+  - name: metrics
+    port: 8081
+    targetPort: 8081
+  selector:
+    app: APP
+---
+# File autogenerated by ./scripts/gen-certs.sh
+apiVersion: v1
+data:
+  cert.pem: CA_BUNDLE
+  key.pem: KEY_PEM
+kind: Secret
+metadata:
+  creationTimestamp: null
+  name: APP-certs
+  namespace: NAMESPACE
+---
+apiVersion: admissionregistration.k8s.io/v1
+kind: MutatingWebhookConfiguration
+metadata:
+  name: APP
+  labels:
+    app: APP
+    kind: mutator
+webhooks:
+  - name: mutator.APP.io
+    admissionReviewVersions: ["v1"]
+    sideEffects: None
+    clientConfig:
+      service:
+        name: APP
+        namespace: NAMESPACE
+        path: /
+      caBundle: CA_BUNDLE
+    rules:
+      - operations: ["CREATE", "UPDATE"]
+        apiGroups: ["*"]
+        apiVersions: ["*"]
+        resources: ["CiliumEnvoyConfig"]

cmd/root.go

@@ -0,0 +1,29 @@
+package cmd
+
+import (
+	"github.com/spf13/cobra"
+	"go.uber.org/zap"
+)
+
+var rootCmd = &cobra.Command{
+	Use: "hook",
+}
+
+func Execute() {
+	if Version == "dev" {
+		logger, err := zap.NewDevelopment()
+		if err != nil {
+			panic(err)
+		}
+		zap.ReplaceGlobals(logger)
+	} else {
+		logger, err := zap.NewProduction()
+		if err != nil {
+			panic(err)
+		}
+		zap.ReplaceGlobals(logger)
+	}
+	if err := rootCmd.Execute(); err != nil {
+		zap.L().Fatal("failed to execute root command", zap.Error(err))
+	}
+}

cmd/server.go

@@ -0,0 +1,151 @@
+package cmd
+
+import (
+	"context"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/oklog/run"
+	"github.com/spf13/cobra"
+	"go.uber.org/zap"
+
+	kwhhttp "github.com/slok/kubewebhook/v2/pkg/http"
+	"github.com/slok/kubewebhook/v2/pkg/log"
+	kwhmutating "github.com/slok/kubewebhook/v2/pkg/webhook/mutating"
+
+	kwhmodel "github.com/slok/kubewebhook/v2/pkg/model"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+type wrapLogger struct {
+	*zap.SugaredLogger
+}
+
+func (n *wrapLogger) WithValues(map[string]interface{}) log.Logger { return n }
+func (n *wrapLogger) WithCtxValues(context.Context) log.Logger     { return n }
+func (n *wrapLogger) SetValuesOnCtx(parent context.Context, values map[string]interface{}) context.Context {
+	return parent
+}
+func (n *wrapLogger) Warningf(template string, args ...interface{}) {
+	n.Warnf(template, args...)
+}
+
+type CmdConfig struct {
+	WebhookListenAddr       string
+	TLSCertFilePath         string
+	TLSKeyFilePath          string
+	EnableIngressSingleHost bool
+	IngressHostRegexes      []string
+	MinSMScrapeInterval     time.Duration
+
+	LabelMarks map[string]string
+}
+
+var (
+	cmdConfig = &CmdConfig{
+		LabelMarks: map[string]string{},
+	}
+	serverCmd = &cobra.Command{
+		Use: "server",
+		Run: func(cmd *cobra.Command, args []string) {
+			var err error
+			logger := zap.L()
+
+			var g run.Group
+
+			// OS signals.
+			{
+				sigC := make(chan os.Signal, 1)
+				exitC := make(chan struct{})
+				signal.Notify(sigC, syscall.SIGTERM, syscall.SIGINT)
+
+				g.Add(
+					func() error {
+						select {
+						case s := <-sigC:
+							logger.Sugar().Info("signal %s received", s)
+							return nil
+						case <-exitC:
+							return nil
+						}
+					},
+					func(_ error) {
+						close(exitC)
+					},
+				)
+			}
+
+			// Webhook HTTP server.
+			{
+				logger := logger.With(zap.String("addr", cmdConfig.WebhookListenAddr), zap.String("http-server", "webhooks"))
+				mt := kwhmutating.MutatorFunc(func(_ context.Context, _ *kwhmodel.AdmissionReview, obj metav1.Object) (*kwhmutating.MutatorResult, error) {
+					logger.Info("mutating webhook called", zap.Any("object", obj))
+					return &kwhmutating.MutatorResult{MutatedObject: obj}, nil
+				})
+
+				// Create webhook.
+				wh, err := kwhmutating.NewWebhook(kwhmutating.WebhookConfig{
+					ID:      "mutator.cilium-envoy-hook.io",
+					Mutator: mt,
+					Logger:  &wrapLogger{logger.Sugar()},
+				})
+				if err != nil {
+					logger.Fatal("error creating webhook", zap.Error(err))
+				}
+
+				// Get HTTP handler from webhook.
+				whHandler, err := kwhhttp.HandlerFor(kwhhttp.HandlerConfig{Webhook: wh, Logger: &wrapLogger{logger.Sugar()}})
+				if err != nil {
+					logger.Fatal("error creating webhook handler", zap.Error(err))
+				}
+
+				server := &http.Server{
+					Addr:    cmdConfig.WebhookListenAddr,
+					Handler: whHandler,
+				}
+
+				g.Add(
+					func() error {
+						if cmdConfig.TLSCertFilePath == "" || cmdConfig.TLSKeyFilePath == "" {
+							logger.Warn("webhook running without TLS")
+							logger.Info("http server listening...")
+							return server.ListenAndServe()
+						}
+
+						logger.Info("https server listening...")
+						return server.ListenAndServeTLS(cmdConfig.TLSCertFilePath, cmdConfig.TLSKeyFilePath)
+					},
+					func(_ error) {
+						logger.Info("start draining connections")
+						ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+						defer cancel()
+
+						err := server.Shutdown(ctx)
+						if err != nil {
+							logger.Error("error while shutting down the server", zap.Error(err))
+						} else {
+							logger.Info("server stopped")
+						}
+					},
+				)
+			}
+
+			err = g.Run()
+			if err != nil {
+				logger.Fatal("error while running the application", zap.Error(err))
+			}
+		},
+	}
+)
+
+func init() {
+	rootCmd.AddCommand(serverCmd)
+
+	serverCmd.PersistentFlags().StringVar(&cmdConfig.WebhookListenAddr, "webhook-listen-address", ":8080", "The address where the HTTPS server will be listening to serve the webhooks.")
+	serverCmd.PersistentFlags().StringVar(&cmdConfig.TLSCertFilePath, "tls-cert-file-path", "", "The path for the webhook HTTPS server TLS cert file.")
+	serverCmd.PersistentFlags().StringVar(&cmdConfig.TLSKeyFilePath, "tls-key-file-path", "", "The path for the webhook HTTPS server TLS key file.")
+}

cmd/version.go

@@ -0,0 +1,24 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	// Version is set at compile time.
+	Version = "dev"
+)
+
+func init() {
+	rootCmd.AddCommand(versionCmd)
+}
+
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Print the version",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println(Version)
+	},
+}

go.mod

@@ -0,0 +1,38 @@
+module gitlab.yoshino-s.xyz/yoshino-s/cilium-envoy-hook
+
+go 1.18
+
+require github.com/oklog/run v1.1.0
+
+require (
+	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/google/gofuzz v1.1.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	golang.org/x/net v0.0.0-20220722155237-a158d28d115b // indirect
+	golang.org/x/text v0.3.7 // indirect
+	gomodules.xyz/jsonpatch/v3 v3.0.1 // indirect
+	gomodules.xyz/orderedmap v0.1.0 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	k8s.io/api v0.25.3 // indirect
+	k8s.io/client-go v0.25.3 // indirect
+	k8s.io/klog/v2 v2.70.1 // indirect
+	k8s.io/utils v0.0.0-20220728103510-ee6ede2d64ed // indirect
+	sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
+	sigs.k8s.io/yaml v1.2.0 // indirect
+)
+
+require (
+	github.com/slok/kubewebhook/v2 v2.5.0
+	github.com/spf13/cobra v1.7.0
+	go.uber.org/atomic v1.11.0 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	go.uber.org/zap v1.24.0
+	k8s.io/apimachinery v0.25.3
+)

go.sum

@@ -0,0 +1,118 @@
+github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
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+github.com/evanphx/json-patch v4.5.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
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main.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	"gitlab.yoshino-s.xyz/yoshino-s/cilium-envoy-hook/cmd"
+)
+
+func main() {
+	cmd.Execute()
+}